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The aurora and the magnetosphere - The Chapman Memorial LectureReview of recent progress in magnetospheric physics, in particular, in understanding the magnetospheric substorm. It is shown that a number of magnetospheric phenomena can now be understood by viewing the solar wind-magnetosphere interaction as an MHD dynamo; auroral phenomena are powered by the dynamo. Also, magnetospheric responses to variations of the north-south and east-west components of the interplanetary magnetic field have been identified. The magnetospheric substorm is entirely different from the responses of the magnetosphere to the southward component of the interplanetary magnetic field. It may be associated with the formation of a neutral line within the plasma sheet and with an enhanced reconnection along the line. A number of substorm-associated phenomena can be understood by noting that the new neutral line formation is caused by a short-circuiting of a part of the magnetotail current.
Document ID
19740055236
Document Type
Reprint (Version printed in journal)
Authors
Akasofu, S.-I. (Alaska, University Fairbanks, Alaska, United States)
Date Acquired
August 7, 2013
Publication Date
June 1, 1974
Publication Information
Publication: Planetary and Space Science
Volume: 22
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NGR-02-001-001
CONTRACT_GRANT: NSF GA-363873X
CONTRACT_GRANT: NSF GA-37094
Distribution Limits
Public
Copyright
Other